Literary usage of Sea slug

Below you will find example usage of this term as found in modern and/or classical literature:

1.The Voyage of the Beagle by Charles Darwin (1909)"Habits of a Sea-slug and Cuttle-fish—St. Paul's Rocks, non-volcanic —Singular
Incrustations—Insects the first Colonists of Islands— Fernando ..."

2.Journal of Researches Into the Natural History and Geology of the Countries by Charles Darwin (1846)"CHAPTER I. Porto Praya—Ribeira Grande—Atmospheric Dust with Infusoria —Habits of
a Sea-slug and Cuttle-fish—St. Paul's Rocks, non- volcanic—Singular ..."

3.Journal of Researches Into the Natural History and Geology of the Countries by Charles Darwin (1846)"CHAPTER I. Porto Praya—Ribeira Grande—Atmospheric Dust with Infusoria —Habits of
a Sea-slug ... Seaslug ..."

4.Journal of Researches Into the Natural History and Geology of the Countries by Charles Darwin (1873)"CHAPTER L Porto Prava—Ribeira Grande—Atmospheric Dust with Infusoria—Habits of
a Sea-slug and Cuttle-fish—St. Paul's Rocks, non- volcanic—Singular ..."